Nucleus Paramedian Dorsal [N. Paramedianus Dorsalis (Posterior), Pna; Syn. I. Paramedian Posterior, Jacobson's Nucleus]

The paramedian dorsal nucleus (Pna) is a small nucleus in the medulla oblongata that lies close to the midline and is adjacent to the hypoglossal nerve nucleus. It plays an important role in regulating the motor function of the tongue and other muscles of the face and neck.

The paramedian dorsal nucleus is part of the paramedian system, which consists of a number of nuclei located in the medulla oblongata and responsible for the regulation of various body functions. It belongs to the paramedian posterior nucleus, also known as Jacobson's nucleus.

In the medulla oblongata, the paramedian dorsal nucleus is adjacent to the nucleus of the hypoglossal nerve and participates in its regulation. It helps control the movements of the tongue, jaw and other organs of the face and neck, and is also responsible for regulating swallowing, salivation and other functions.

The study of the paramedian dorsal nucleus and its role in the regulation of movements of the tongue and other organs is an important area in neurophysiology and neuroanatomy.

The Paramedian Dorsal nucleus (N. Paramedianus Dorsalis Posterior), or, as it is also called, Jacobson’s nucleus, is one of the important nuclei in the medulla oblongata. It is located in the posterior part of the medulla oblongata and is adjacent to the nucleus of the hypoglossal nerve. Jacobson's nucleus is involved in the regulation of motor functions of the tongue and also plays an important role in the control of breathing and swallowing.

Jacobson's nucleus is part of the paramedian system, which consists of several nuclei located in the medulla oblongata and spinal cord. This system is responsible for regulating many functions such as breathing, swallowing, speech and hearing. The Jacobson nucleus is connected to the language centers in the brain and is involved in the regulation of tongue movement.

With pathology, for example, with damage to the medulla oblongata or spinal cord, the tongue may become impaired, which can lead to problems with speech and swallowing. Therefore, the study of the Jacobson nucleus and the paramedian system as a whole is an important tool for the diagnosis and treatment of such conditions.